Granted Patent
Utility
US 4,823,167 · App. 06/942,356
Catheter calibration device
Inventors:
Wayne E. Manska, Roger G. Bickelhaupt
Patented Case
View Patent ↗
Granted: Apr 18, 1989
Filed: Dec 16, 1986
Inventors
Wayne E. Manska
Roger G. Bickelhaupt
Assignee (at issue)
Baxter International Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.